Tuple<T1,T2,T3,T4>.Item2 Proprietà

Definizione

Ottiene il valore del secondo componente dell'oggetto Tuple<T1,T2,T3,T4> corrente.

public:
 property T2 Item2 { T2 get(); };
public T2 Item2 { get; }
member this.Item2 : 'T2
Public ReadOnly Property Item2 As T2

Valore della proprietà

T2

Valore del secondo componente dell'oggetto Tuple<T1,T2,T3,T4> corrente.

Esempio

Nell'esempio seguente viene definita una matrice di Tuple<T1,T2,T3,T4> oggetti i cui componenti contengono il nome di una città, un mese dell'anno e la media delle temperature elevate e basse per quel mese. Recupera quindi e visualizza il valore di ogni componente.

using System;
using System.Globalization;

public class Example
{
   public static void Main()
   {
      Tuple<string, int, double, double>[] temperatures = 
            { Tuple.Create("New York, NY", 4, 61.0, 43.0),
              Tuple.Create("Chicago, IL", 2, 34.0, 18.0), 
              Tuple.Create("Newark, NJ", 4, 61.0, 43.0),
              Tuple.Create("Boston, MA", 6, 77.0, 59.0),
              Tuple.Create("Detroit, MI", 9, 74.0, 53.0),
              Tuple.Create("Minneapolis, MN", 8, 81.0, 61.0) }; 
      // Display the array of 4-tuple objects.
      Console.WriteLine("{0,41}", "Temperatures");
      Console.WriteLine("{0,-20} {1,5}    {2,4}  {3,4}\n", 
                        "City", "Month", "High", "Low");
      foreach (var temperature in temperatures)
         Console.WriteLine("{0,-20} {1,5}    {2,4:N1}  {3,4:N1}", 
                           temperature.Item1, 
                           DateTimeFormatInfo.CurrentInfo.GetAbbreviatedMonthName(temperature.Item2 - 1), 
                           temperature.Item3, temperature.Item4);
   }
}
// The example displays the following output:
//                                    Temperatures
//       City                 Month    High   Low
//       
//       New York, NY           Mar    61.0  43.0
//       Chicago, IL            Jan    34.0  18.0
//       Newark, NJ             Mar    61.0  43.0
//       Boston, MA             May    77.0  59.0
//       Detroit, MI            Aug    74.0  53.0
//       Minneapolis, MN        Jul    81.0  61.0
open System
open System.Globalization

let temperatures = 
    [| Tuple.Create("New York, NY", 4, 61.0, 43.0)
       Tuple.Create("Chicago, IL", 2, 34.0, 18.0) 
       Tuple.Create("Newark, NJ", 4, 61.0, 43.0)
       Tuple.Create("Boston, MA", 6, 77.0, 59.0)
       Tuple.Create("Detroit, MI", 9, 74.0, 53.0)
       Tuple.Create("Minneapolis, MN", 8, 81.0, 61.0) |] 

// Display the array of 4-tuple objects.
printfn "%41s" "Temperatures"
printfn "%-20s %5s    %4s  %4s\n" "City" "Month" "High" "Low"
for temperature in temperatures do
    printfn $"{temperature.Item1,-20} {DateTimeFormatInfo.CurrentInfo.GetAbbreviatedMonthName(temperature.Item2 - 1),5}    {temperature.Item3,4:N1}  {temperature.Item4,4:N1}" 
// The example displays the following output:
//                                    Temperatures
//       City                 Month    High   Low
//       
//       New York, NY           Mar    61.0  43.0
//       Chicago, IL            Jan    34.0  18.0
//       Newark, NJ             Mar    61.0  43.0
//       Boston, MA             May    77.0  59.0
//       Detroit, MI            Aug    74.0  53.0
//       Minneapolis, MN        Jul    81.0  61.0
Imports System.Globalization

Module Example
   Public Sub Main()
      Dim temperatures() = 
             { Tuple.Create("New York, NY", 4, 61, 43), _
               Tuple.Create("Chicago, IL", 2, 34, 18), _ 
               Tuple.Create("Newark, NJ", 4, 61, 43), _
               Tuple.Create("Boston, MA", 6, 77, 59), _
               Tuple.Create("Detroit, MI", 9, 74, 53), _
               Tuple.Create("Minneapolis, MN", 8, 81, 61) } 
      ' Display the array of 4-tuples.
      Console.WriteLine("{0,41}", "Temperatures")
      Console.WriteLine("{0,-20} {1,5}    {2,4}  {3,4}", 
                        "City", "Month", "High", "Low")
      Console.WriteLine()
      For Each temperature In temperatures
         Console.WriteLine("{0,-20} {1,5}    {2,4:N1}  {3,4:N1}", 
                           temperature.Item1, 
                           DateTimeFormatInfo.CurrentInfo.GetAbbreviatedMonthName(temperature.Item2 - 1), 
                           temperature.Item3, temperature.Item4)
      Next
   End Sub
End Module
' The example displays the following output:
'                                    Temperatures
'       City                 Month    High   Low
'       
'       New York, NY           Mar    61.0  43.0
'       Chicago, IL            Jan    34.0  18.0
'       Newark, NJ             Mar    61.0  43.0
'       Boston, MA             May    77.0  59.0
'       Detroit, MI            Aug    74.0  53.0
'       Minneapolis, MN        Jul    81.0  61.0

Commenti

È possibile determinare dinamicamente il tipo del Item2 componente in uno dei due modi seguenti:

Si applica a